Now the targeting of users is interesting. This part is just hypothesis, but in theory they could use search to look up people. For example, they could find people on Facebook and see what kind of friends they have, even interests for example. They can check out whom follows who on twitter. All in all, they can in theory data mine the net to target out specific users whom will fill the role for Marketing, Feedback and Development.

Note that I do not believe that Google does this kind of datamining, but I believe that they are capable of it. Just as anyone is capable of it, there are even services available for this specific task.